Ahistorian is examining the concept of monarchy or government ruled by a king or queen which question mioght the historian ask if organizing his study by region

How did European kings justify their power differently from Asian kings?

That is the only option which focus on area and includes comparission between the centers of power and ruling

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The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict